9AU2Colours教材知识点全解

Comic strip
it on.把它试穿下。

Try on意为“试穿”，此处的on是副词，若宾语是代词，则需放在try和on之间。

The girl is trying on her new coat.
What a beautiful dress! Can I try it on
2. But there is nothing wrong with pink….
There is nothing wrong with…相当于There isn’t anything wrong with…..或Nothing is wrong with…….意为“。

没什么问题”
Don’t worry about your son. There is nothing wrong with him.
拓展：
○1该句的肯定形式为：There is something wrong with……或something is wrong with……. There is something wrong with my bike. Can you repair it for me
○2该句的一般疑问句为：Is there anything wrong with…或Is anything wrong with…. Is there anything wrong with my teeth
---No, Nothing is wrong.
I’m not sure if blue looks good on you.
（1）sure用做形容词，意为“确信，肯定”，其后可跟of短语，动词不定式或从句。

I’m sure of the time of the meeting.
He is sure to come here on time.
I’m sure that my father will buy me a new bike.
拓展：○1make sure 意为“确保，设法保证”，其后长接of短语或从句。

I tried to make sure of the problem.
Make sure that no one finds out about it.
○2sure用作副词，意为“当然”，表示同意，相当于“certainly”或“of course”
Will you please open the door
----Sure/ Certainly./ Of course.
（2）if 连词，意为“是否”，引导宾语从句。

I don’t know if he can finish the work.
Can you tell me if he likes that book
拓展：if 还可引导条件状语从句。

If you see my father, give him this note.
（3）…….look good on （sb）意为“（某人）穿。

好看”，相当于“sb. look（s） good in +颜色/衣服”
I think red looks good on you.= I think you look good in red.
Welcome to the unit
1. One day, Millie looked out of her window after a rain shower and saw a rainbow.（1）One day意为“某天；一天”既可以表示将来的某一天，也可以表示过去的某一天。

One day，he went back to school again.
I think you will be sorry one day.
（2）look out of “向。

外看”，后面可以跟宾语，如果不跟宾语，则用look out，意为“向外看”
I looked out of the window and saw a bird in the tree.
The teacher asked the boy not to look out in class.
拓展：○1 look out 还可意为“当心，小心”，相当于be careful.
Look out ! The bus is coming.
○2look 构成的短语：
Look after照顾 look for 寻找 look sb up and down上下打量
Look about/ around环顾四周 look down 向下看 look up向上看，查找
Look forward to 期待 look down on 看不起 look through浏览，仔细查看
Look over检查 look at 看。

Reading
1. Some people believe that colours can influence our moods.
Influence用作及物动词，意为“影响，起作用”。

后面可以跟名词或代词作宾语，可以跟动词不定式做宾语补足语，即influence sb. to do sth“影响某人做某事”。

The weather influences the crops.
I was influenced to accept the job by my father.
拓展：influence还可用作名词，既可以做可数名词，也可作不可数名词，意为“影响，作用”，常构成have （an）influence on sb/sth. 对。

有影响。

His best friend has a good influence on him.
Smoking has a bad influence on people, especially women and children.
may wonder whether it is true.
（1）wonder此处用作及物动词，意为“想知道”，相当于want to know，其用法如下
○1其后可接if/whether引导的从句，表示有礼貌的询问
She wondered if/whether you would be free the next day.
○2其后可接who, what. 等疑问词引导的从句
I wonder who cleaned up the room just now.
○3其后可接“疑问词+动词不定式”构成的短语。

I wonder what to do next.
拓展： wonder 可用作可数名词，意为“奇迹，奇观”
The Great Wall is a man-made wonder.
（2）whether用作连词，意为“是否”，可引导宾语从句、主语从句和表语从句，还可以后跟动词不定式。

常用语whether….or not结构。

Can you tell me whether you are going to attend the meeting
The question is whether the car is worth buying.
I haven’t decided whether to go to Shanghai with him.
（3）true此处用作形容词，意为“真实的”。

指某事与事实相吻合，强调事物的客观真实性，也可用于指事物客观真实的一面，即“实质的”，可用作表语或定语。

He was true to his word.
True friendship is worth more than money.
拓展○1truth名词，意为“事实，真理”
○2truly副词，意为“真实地，真诚地”，多用于强调事物的真实性。

fact, colours can change our moods and make us feel happy or sad ,energetic or sleepy.
（1）Energetic形容词，“活力的”其名词为energy“能量；精力，活力”
I know he is energetic. = I know he is full of energy.
It’s a waste of time and energy.
中考链接
Fred is always _______ because he often does something good for his health outdoors.
A. weak
B. nervous
C. serious
D. energetic
（2）sleepy 形容词，“困倦的；瞌睡的”可做定语或表语。

Please wake up the sleepy boy.
She suddenly started to feel very sleepy.
He lay down on the sofa and soon fell asleep.
Did you sleep well last night
Can you give me something to help me get to sleep
中考链接
-----Why are you looking ____ in class all day
----Because I can’t finish my homework until eleven every night.
A. awake
B. asleep
C. sleeping
D. sleepy
4. Have you ever walked into a room and felt relaxed
Relaxed形容词“放松的，冷静的”。

Be relaxed about sth.“对某事随意/放松/不严格”We’re pretty relaxed about time.
People are often relaxed at weekends.
I have a relaxing evening with my friends.
I just want to sit down and relax.
中考链接
Listening to the ______music always makes me ______.
A .relaxed; relaxing B. relaxed; relaxed
C. relaxing; relaxing
D. relaxing; relaxed
could be because the walls were painted blue.
could be“可能是”，为情态动词could+be结构，用于表示对人或对事物可能性的推断，也可写作can be.但can be 一般只用于否定句或疑问句中。

This book could be Mary’s.
That book can’t be hers. Her book is on her desk.
拓展：○1might/may be “可能是”might的语气比may be 更弱。

The boy might be in his bedroom.
○2must be “一定是”，表示有把握的推断。

This dictionary must be Ning’s. It has her name on it.
brings peace to our mind and body.
Peace用作不可数名词，意为“和平；安宁；和睦”
I am sure that people all over the world love peace.
拓展○1in peace “平静的，安宁的”
○2peaceful形容词，意为“和平的，宁静的”
○3peacefully副词，意为“平静地”
中考链接
Justin lay back and enjoyed the ____ （安宁）of the summer evening.
women like to wear white on their wedding day.
Wear（wore,worn）此处用作及物动词，意为“穿着（衣服）；戴着（帽子，眼镜，首饰等）”They like wearing uniforms.
Lucy often wears a pair of glasses.
If you wear jeans, the teacher won’t let you in.
Mrs Baker got up and dressed her child.
Jenny put on her hat and went out.
He is always in his green shoes.
中考链接
Mary is used to _____ a T-shirt and jeans.
A. wear
B. put on
C. wearing
D. putting on
in cold areas prefer warm colours in their homes to create a warm and comfortable feeling.
（1）prefer（preferring, preferred, preferred）做及物动词，意为“更喜欢”，相当于like。

better，其后通常跟名词，代词或动名词做宾语。

I prefer beef =I like beef better.
Do you prefer tea or orange juice
拓展：○1 prefer（doing）sth to （doing）sth意为“比起（做）某事更喜欢（做）某事；喜欢（做）某事而不喜欢（做）某事”，prefer后的词为“喜欢或愿意做的事”，跟在to后的词为“不喜欢或不愿做的事”，此处to为介词，故prefer和to后只能跟名词、代词、动名词。

He prefers coffee to tea.
I prefer doing to talking.
○2 prefer to do sth rather than do sth.相当于would rather do sth than do sth.意为“宁愿做某事而不愿做某事”
He preferred to telephone her rather than write to her.
中考链接
I prefer____ some shopping to _____ camping since the weather isn’t lovely.
A. do; doing
B. doing; go
C. do; go
D. doing; going
（2）create此处用作及物动词，意为“造成，引起；创造，创建”
Her behavior created a lot of problems.
Dickens created many vivid characters in his novels.
拓展：○1creative 用作形容词，意为“有创造力的”
○2creation用作可数名词，意为“创造物；作品”用作不可数名词，意为“创造，创建” can cheer you up when you are feeling sad.
cheer up“（使）高兴起来，（使）振作起来”这里的cheer 用作动词。

意为“鼓舞，鼓励”He is so sad. Let’s do something to cheer him up.
Listening to music can make you cheer up.
拓展○1 cheer 用作可数名词，意为“欢呼声，喝彩声”
○2 cheerful用作形容词，意为“快乐的，令人愉快的”
is the colour of the sun, so it can remind you of a warm sunny day. Remind…of….意为“使。

想起。

” remind此处用作及物动词，意为“提醒，使想起”The book remind me of my best friend.
拓展remind还有以下结构
○1 remind sb that从句，意为“提醒某人。

”
He reminds me that I should go on.
○2 remind sb to do sth意为“提醒某人做某事”
What you said remind me to see Mike in hospltal.
11. Some people prefer this colour when they hope for success.
（1）hope for 意为“希望，期望，期待”
They all hope for health.
辨析：hope ，wish与expect
I hope/wish to see you soon.
I hope my dream will come true in the future.
-----Will the rain stop tomorrow
------I hope so. I t has rained for half a month. It’s too wet.
Best wishes!
Every teacher wishes/expects the students to study hard to make progress.
（2）success用作不可数名词，意为“成功”可构成have success,意为“成功，取得成功”。

用作可数名词，意为“成功的人，成功的事”
Don’t worry. He will have success at work.
Failure is the mother of success.
I am sure the fashion show will be a success.
中考链接
根据句意和首字母或汉语提示，将单词的正确形式写在相应的位置上。

Believing in yourself is the first step on the road to ____（成功）
you require strength in either body or mind, red may be of some help to you.（1）require 用作及物动词，意为“需要，要求”，后面跟名词，代词作宾语，其用法与need类似。

If you require further information, you can surf the Internet.
拓展：require的常见用法
○1 require sb to do sth.要求某人做某事
The teacher required the students to keep silent.
○2 require doing sth= require to be done需要被做
The clothes require washing = The clothes require to be washed.
（2）be of +n+to do相当于be+adj+to sb. 这里的be of some help to you意为“对你有些帮助”相当于be helpful to you.
I think the book is of great use to you=I think the book is very useful to you. Health is of great importance to everybody.= Health is very important to everybody. red can also make it easier to take action.
Make it +形容词（比较级）+to do sth意为“使做某事更。

”，其中it为形式宾语，真正的宾语为动词不定式结构，形容词（比较级）做宾语补足语。

Working in groups makes it less difficult to learn math.
拓展：与make类似用法的单词还有：feel，think, believe, find, consider等。

I felt it necessary to repeat it.
I find it difficult to get on with him.
may help when you are having difficulty making a decision.
（1）have difficulty （in）doing sth意为“做某事有困难；做某事费劲”是固定搭配。

还可构成have difficulty with sth结构。

If you have different kinds of skills, you will have no difficulty in getting jobs. If you have difficulty with the problem, you can turn to your teacher for help.拓展：○1have trouble in doing sth/with sth做某事有麻烦
The boy had trouble in finding the hotel yesterday.
○2 have problems in doing sth/with sth.做某事有问题
If you have problems with anything, you can call me.
○3have fun/have a great time in doing sth很开心地做某事
The children often have fun in playing games in the park.
中考链接
----I have great ______ in finishing the work by myself. Could you help me
-----No problem.
A. fun
B. success
C. advice
D. difficulty （2）make a decision 意为“做决定”，是固定短语，也可写作make decisions. Make a decision to do sth.意为“决定做某事” He made a decision to go camping. -----Where are you going on holiday -----I haven ’t made a decision. 中考链接 完成英文句子
Please don’t ______________ when you are angry. or think about something 忆起或想起某事
Remember 及物动词，意为“记得，想起”后面跟名词、代词、动名词以及动词不定式做宾语。

Do you still remember your first teacher Remember to write to us when you get there. 辨析：remember to do sth 与remember doing sth
类似。

You should work hard at your lessons.
拓展：○
1hard 用作副词，还可意为“猛烈地” ○
2 hard 用作形容词，意为“坚硬的，困难的” Grammer
is sure that yellow can bring her good luck. Luck 此处用作不可数名词，意为“机遇，运气”，good luck 意为“好运气” What a piece of luck!
He always has good luck in what he does.
拓展：○
1luckey 形容词，意为“幸运的”常构成固定短语be lucky to do sth. 其反义词是unlucky,意为“不幸的”
She was lucky to be chosen for the team. You are a lucky dog.
○
2luckily 副词，意为“幸运地”反义词unluckily. Luckily, he wasn ’t hurt in the accident.
2. I think colours influence our everyday lives in many ways. Everyday 形容词，意为“日常的”，只作定语。

These are her everyday clothes. Most of them are red. The Internet has become a part of everyday life. We should take exercise every day.
3. Most people think light colours are better than dark ones.
Light此处用作形容词，意为“浅色的，淡色的”其反义词为dark“深色的”
I prefer light colours to dark ones.
拓展○1 light做形容词时，还可意为“轻的”其反义词为heavy“重的”
○2 light用作不可数名词，意为“光线”
○3 light用作可数名词，意为“灯”
○4 light（lit/lighted,lit/lighted）用作及物动词，意为“照明，照亮”。

也可用作不及物动词，意为“点亮，亮起来”
The candle lit in the room.
It’s time to light up.
notice light colours make rooms seem larger.
（1）notice此处用作及物动词，意为“注意，注意到”，其后接名词、代词或that从句。

He didn’t notice me.
I noticed he left early.
辨析：notice sb to do sth与notice sb doing sth
拓展○1 notice用作可数名词，意为“通知，布告，告示；公告牌，警示牌”
意为“注意”
A. notice
B. look
C. watch
D. read
（2）seem此处用作连系动词，意为“好像，仿佛，似乎”。

常用于“seem+形容词/名词/动词不定式”结构
She seems happy.
He seems a nice man.
They seem to be students.
They seem to know what they are doing.
拓展：seem的其他用法
○1 seem like ……好像 It seemed like a disaster at that time.
○2It seems+ that 从句可与seem to do/be sth.
It seems that she is happy.=She seems to be happy.
5. True, but it depends on personal taste.
Taste此处用作名词，意为“爱好，志趣”
The colour and style is a matter of personal taste.
拓展：○1 taste用作名词，还可意为“味觉，味道”
Taste is one of the five senses.
The meat has an unpleasant taste.
○2 taste用作及物动词，意为“尝，品尝”
Taste this coffee and see if you like it.
○3 taste用作连系动词，意为“有。

味道”后跟形容词做表语。

This kind of drink tastes sweet.
6. Is the sports bag made of cotton
Be made of意为“用。

制成”，指从成品能看出原材料
The desk is made of wood.
拓展：○1be made from意为“用。

制成”，指从成品不能看出原材料
The wine is made from grapes.
○2be made in 意为“在某地制造”
Don’t you know that the car is made in China
○3 be made up of意为“由。

组成，由。

构成”
The park is made up of a man-made lake and a hill.
○4be made into意为“被制成。

”
His novel was made into a film.
I stay at home instead of going shopping with my classmates
instead of介词短语，意为“代替，而不是”
We went there on foot instead of by bike.
I like walking instead of running.
辨析instead of 与instead
He will be on duty instead of me tomorrow.
They didn’t go swimming. They went to play football.
中考链接
What a nice day! We should go sightseeing _______watching TV in the hotel.
A. because of
B. instead of
C. together with
D. out of
may wonder if/whether it represents anything else.
（1）anything else意为“别的什么事”是不定代词anything+else结构，在肯定句中用something else.
Do you want anything else
Let’s talk about something else.
（2）else副词，意为“别的，其他的”，常放在不定代词或疑问词的后面。

I can see nobody else in the room.
Where else have you ever been
拓展：else所有格的形式是else’.
This is somebody else’s book
9. Did the rulers in ancient Europe like to wear purple
Europe专有名词，意为“欧洲”。

European 可用作形容词，意为“欧洲的”也可用作可数名词“欧洲人”“一个欧洲人”用a European
I plan to travel around Europe.
Trance is a European country.
A number of Europeans like to eat Indian food.
Integrated skills
: 100yuan for half an hour.
Price用作可数名词，意为“价格，价钱”。

Price做主语时，谓语动词一般用单数形式。

谈论价格的高低用high 或Low,谈论东西的贵贱用expensive或cheap.询问价钱时，不用how much与price 的搭配，而要用What’s the price of…….
The price of wheat is high now.
What’s the price of apples
promise that this therapy can help you change your moods, or you will get your money back!
Promise此处用作及物动词，意为“承诺，允诺，答应”，后接名词代词。

动词不定式或从句做宾语。

I promise you.
The old man promised to give the money to his son.
He promised that he would help me.
拓展：○1 promise用作不及物动词，意为“允诺，做出保证”
I’ll try to come, but I can’t promise.
○2 promise还可用作可数名词，意为“允诺；诺言”
Make a promise做出承诺
Keep/break one’s promise 履行/违背诺言
中考链接
He promised ________ his old friend during his stay in Tianjing.
A. see
B. seeing
C. saw
D. to see
has practised colour therapy since she left college.
（1）practise用作及物动词，意为“从事，执业”
His friend hasn’t practiced medicine for a long time.
注意：在美式英语中，practice既是动词也是名词。

在英式英语中practise是动词，practice是名词。

拓展○1practise用作及物动词，还可意为“练习，训练”，后面可跟名词、代词或动名词做
宾语。

I practice English every morning.
His son practices playing the piano every day.
○2practise用作不及物动词，意为“练习，实践”
She practiced hard for the coming match.
○3practise用作不可数名词，意为“实践，练习”.
They need a lot of practice.
（2）since此处用作连词，引导时间状语从句，也可做介词，意为“从。

来，自。

之后”，可以和表示过去某一时刻的词（短语）连用。

Since后不管跟词（短语）还是句子，都是表示时间点。

I haven’t seen him since I left that factory.
He has worked in this factory since five years ago.
拓展○1for做介词，可以和表示一段时间的词或短语连用。

The Greens has lived in the city for ten years.
○2ago 做副词，用于一段时间后。

Two days ago.
助记
For，since与ago表时间的用法
For后时间是一段；since用法有特点
过去时间直接加；ago陪伴段时间
句子时态用过去，灵活运用记心间
（3）leave（left，left）此处用作及物动词，意为“离开”，也可用作不及物动词。

但要注意： leave是终止形动词，在与since或for等引导的表示一段时间的状语连用时，要用be away 来表示离开的状态。

He left his hometown on a cold winter morning.
My father has been away from his company for two years .
拓展：leave 用作及物动词，还可意为“忘了带；丢下”
The boy left his homework at home.
中考链接
Mr Brown____________ his hometown since he ___________ the army.
A. has left; joined
B. has been away from; has joined
C. has been away from; joined
D. left; joined
4. She suggests different clothes to different people.
Suggest用作及物动词，意为“建议”，后面跟名词、代词或动名词做宾语，不能跟动词不定式。

My friend suggested going on a trip.
She suggested putting off the meeting.
拓展：○1suggest后不能跟双宾语，但可以用to 引出，即suggest sth to sb.
John first suggested this idea to me.
○2suggestion是suggest 的名词形式，是可数名词，意为“建议”。

意思同advice,但advice 是不可数名词。

Thank you for your suggestions/advice.
’d rather wear orange.
Would rather 意为“宁愿；更喜欢”后接动词原形。

Would rather。

than…..意为“宁愿。

也不愿。

”
He would rather keep time for his hobbies.
She would rather help her father on the farm than play the piano.
注意：Would rather。

than…..句型可以和prefer….to….互换。

I would rather stay at home than go shopping with him. =I prefer stay at home to going shopping with him.
中考链接
His uncle would rather ______ in the countryside than ______ to the city.
A. stay; moving
B. to stay ; move
C. stay; move
D. to stay; to move
Study skills
1. In many places, baby boys are dressed in blue and baby girls in pink.
Dress用作及物动词，意为“（给。

）穿衣服”，dress后面的宾语通常是人，不是衣服。

当表示自己穿衣服时，则用反身代词。

The boy is too young to dress himself.
She dressed the children in their best clothes.
拓展：○1be dressed in “穿。

的衣服”，其后接表示衣服或颜色的名词。

He is often dressed in blue.
○2dress up （as）意为“盛装打扮（成）。

”
The boys all dresses up as soldiers.
○3dress用作可数名词，意为“连衣裙”
I want to buy a white dress.
Task
she feels weak, and that is why she is wearing red---she just want to make herself look more powerful.
Maybe 副词，意为“或许，也许”，相当于perhaps，表示有比较大的可能性，口语中使用较多，含有推测意味。

Maybe he has finished his homework.
拓展：maybe 与may be有时可以相互转换。

Maybe it’s his hat = It may be his hat.
辨析：Maybe 与may be
Maybe you can go with him.
Nick may be playing basketball.
think the women must feel a little bit dressed, and she hopes these colours will change that.
a little bit意为“稍微，有点”相当于a bit ,可用于修饰形容词或副词的原级或比较级，但不能用于修饰名词。

I get a little bit tired.
This box is a little bit heavier than that one.
拓展○1 a little意为“一点”，可修饰不可数名词，也可以修饰形容词或副词以及其比较级。

、It is a little colder today than yesterday. Why not put on more clothes
○2a bit 意为“一点”，修饰形容词，副词或其比较级。

After the work, I felt a bit tired.
○3a bit of 意为“一点”，后跟不可数名词，相当于a little.
Can you give me a bit of advice
and white are a good match, as the powerful red balances the calm white.
Match此处用作可数名词，意为“相配，般配”
This chair is a good match for that one.
拓展：○1match用作及物动词，意为“与。

相配”。

也可用作不及物动词，意为“匹配，搭配”
○2 match此处用作可数名词，意为“火柴”
○3 match此处用作可数名词，意为“比赛”。

可构成短语watch a match“观看比赛”have a match“进行比赛”
三、语法大聚焦
that引导的宾语从句
宾语从句是指一个句子充当宾语，在主句与从句之间有一个引导词。

【一语击破】
A．引导词本身的省略与不省略
1．可以省略
连词that引导宾语从句，只起连接主、从句的作用，它本身无意义，在口语或非正式文体中常省略。

如：
He says( that) he is a Young Pioneer.
他说他是个少先队员。

2．不可以省略
(1)从句的主语是that时，that不省略。

如：
We know that that is an interesting story.
我们知道那是一个有趣的故事。

(2) that引导的宾语从句中若再有复合句时，that不能省略。

如：
I think that if you have lost the library book, you must pay for it．我认为如果你已把图书馆的书丢失了，你就必须赔偿。

(3)主、从句之间有插入语时，that不能省略。

如：
It says here, in the newspaper, that English is getting more and more important.
报纸上写着，英语正变得越来越重要。

B．何时使用that引导的宾语从句
that引导的宾语从句，表示陈述一件事，即由陈述句转化而来。

如：
He says( that) he is listening to the weather report.
他说他正在听天气预报。

1．主句的谓语动词是think，hear，hope，wish，remember，forget，know，say，guess 等时，常接that引导的宾语从句。

如：
I hope( that) he will be fine soon.我希望他很快好起来。

2．主句由“连系动词+形容词”构成的“系表”结构，常接that引导的宾语从句。

这类形容词多表示感情，如happy，glad，pleased，sad，sure，afraid等等。

如：
I'm afraid( that) he can't come．恐怕他不能来了。

C．that引导的宾语从句相关的内容
1．语序
不论什么情况下，宾语从句都要用陈述语序，即“主语+谓语+其它”。

如：
Do you think( that) the radio is too noisy
你认为收音机太吵吗
2．时态
that引导的宾语从句，主句用一般现在时，从句可以用符合句意要求的任一时态。

如： He says( that) they have returned already.
他说他们已经回来了。

如果主句用一般过去时，从句要用过去时态的某种形式（一般过去时，过去进行时，过去将来时，过去完成时）。

如：
He said( that) he bought a new dictionary.
他说他买了本新词典。

【友情提醒】
如果从句表达的是客观事实、真理、自然现象、名言、警句、格言、谚语等等，尽管主句用一般过去时，从句也要用一般现在时。

如：
He said that time is life．他说时间就是生命。

B if和whether引导的宾语从句
1．何时使用if或whether引导的宾语从句
if或whether引导宾语从句时，作“是否”讲，常放在动、词ask，see，say，know 和find out等后面。

一般情况下，两者常可换用，在口语中多用if。

如：Nobody knows whether( if)it will rain tomorrow.
没有人知道明天是否下雨。

2．if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。

(1)if或whether不能和that或其他连词（副词）同时使用，也不能省去。

如：
I don't know if(whether) he will come here today.
我不知道他今天是否会来。

(2)if或whether引导的宾语从句时，虽具有疑问意义，但从句语序应用陈述句语序。

(3)if或whether引导的宾语从句应和主句的时态保持一致。

即主句为一般现在时，从句用任一种时态；主句为一般过去时，从句则用过去时中的任一种时态。

如：
I don't know if(whether) he has come here.
我不知道他是否来过这儿。

3．if和whether的区别：
(1)在动词不定式之前只能用whether。

如：
I can't decide whether to stay.
我不能决定是否留下。

(2)在whether… or not的固定搭配中。

如：
1 want to know whether it's good news or not.
我想知道是否是好消息。

(3)在介词后，只能用whether。

如：
His father is worried about whether he loses his work.
他的父亲担心是否会失去工作。

(4)宾语从句放在句首表示强调时，只能用whether。

如：
Whether they can finish the work on time is still a problem.他们是否能准时完成这项工作还是个问题。

(5)用if会引起歧义时，只用whether。

如：
Could you tell me if you know the answer
这句话有两种意思：“你能告诉我是否知道答案吗”或“如果你知道答案，请告诉我，好吗”。

如用whether可避免歧义。

中考链接
（1）------Excuse me. I wonder ______ there is a bus here to go to Dowming Street.
---------Yes. Bus No. 223.
A. that
B. when
C. why
D. whether
（2）----I wonder __________.
------Yes, of course.
A. where we can buy the parts.
B. how often you hear from your sister
C. if I may have a word with you
D. why he arrived late yesterday
（3）---Could you please tell me ________
------Yes. There is one on Center Street.
A. where can I buy some stamps
B. when you will take your vacation
C. when was the telephone invented
D. if there are any good restaurants around here.。